Features:Pneumatic seat height adjustment,Adjustable back rest available in different types and shapes,Cushioned seat and back,Pentagonal base for maximum stability,Elbow arm rest/handle can swivel 90 and can slide horizontally,Elbow arm rest height can be adjusted vertically as per surgeons' requirements,Elbow arm rest width can also be adjusted,Up front position of back rest gives support to back,Ideally placed foot switches for up and down movements help surgeons during surgical/operation work